Another 273 commando build .. This one will be a "BEAST"

-
Deep Creep. Done said it once.
 
chryslerfat said:
The piston top is not thick enough to take the full force of a screw acting as a press and will break.
Click to expand...
I agree. That's why I suggested using air pressure . Of course, 100psi would be too much, but maybe using a bicycle pump and not exceeding 30psi or so might work.
 
chryslerfat said:
The piston top is not thick enough to take the full force of a screw acting as a press and will break.
Click to expand...
how about a 1/4" steel plate 3.6" bore size ? but like I said it's a dome piston . I'd have to keep that plate level with a shim .
 
rustycowll69 said:
I agree. That's why I suggested using air pressure . Of course, 100psi would be too much, but maybe using a bicycle pump and not exceeding 30psi or so might work.
Click to expand...
More than 100 psi on that piston top when the engine was running! And fire too!!!!!:BangHead::BangHead::BangHead:
 
stroker402 said:
getting creative here now..........I thought about 1/4 " flat metal plate ... bolt yo top of that cyl bore .. drill a hole in center plate ...weld a big nut on it .. then a long threaded bolt to a flat plate lying on top the piston . and just crank the screw down by hand and it should move. problem is .. the highest flat part of the dome piston is off center and wouldn't apply equal pressure to the piston. I might work though. just a thought .
Click to expand...

Nope, you'll crush the crown, or hole a piston
 
pishta said:
Flip motor over and fill from the bottom with diesel. Let it set. How about dry ice on bottom of the piston, let it shrink it? Heat the block with the forced air heater (if you got one) then fill the skirt with dry ice pieces. The AL will cool much faster than the #250 iron block. Maybe enough to break it. I would put the crank back in and bolt the rod back up and use a break bar on the crank to pull the piston down when its super cold so as not to crack a frozen brittle piston with an impact or use the air pressure: 100 psi over a 273 crown is over 1100 lbs force. Make sure its bolted to the crank or it'll self destruct when it breaks free and hammers the block on its way down.

<< holy ****, I just passed 14,000 posts! Hope I helped someone along the way!) >>
Click to expand...

I like this idea, dry ice by itself shrinking piston should work
 
If a 100 pounds of air pressure is too much you should be able to knock them loose with a block of wood and a hammer.
 
If you get them out and are having problems with the rings, you're welcome to bring them up to Mequon and I can run them in my ultrasonic tank. It's not an industrial one, but does a pretty good job. I'll make sure my take will take a 4" piston first...
 
Subscribed - hope you post what worked for you when you get it freed - inquiring minds want to know. I've read/seen a lot of the methods people have posted in this thread. One thing I recently saw on Uncle Tony's Garage (whitepunkonnitro on fabo) was filling the cylinder with white vinegar and letting it sit for a few days. He talks about this in bottle rocket #10 at around the 4:40 mark, and then again in bottle rocket 11 where they manage to get it out.
Anyway, best of luck and I'm looking forward to watching this thread.
 
Believe it or not, a friend got a Ford 352 from a Galaxie unstuck by filling the cylinders with Coca-cola, left them to sit for a few days, filled them with oil after that, then tapped them with a wooden mallet. The acid in the coke actually ate through the rust and the oil obviously lubed it up enough to get them to move. That engine had sat in a field for 20 years! He honed them out, RE ringed the pistons, and rebuilt the engine. The thing ran great
 
well .......after soaking will numerous sovents for 3 days I finally Got them All to move a inch . I 'll soak them again with sea foam deep creep tonight and will push them out tomorrow. What a JOB !
So here's how I got them out ....... with a Broom handle cut to length to use from inside on the side bosses of the piston and then for the top side I chiseled down a 4x4 block of wood ....shaped it for 3.63 bore and then shaped the wooden head of the block to the shape of the top of piston dome . so it would hit evenly across the piston . then Gave it a good wack and it moved. soaked it some more . wacked it back and forth until they all moved some . take them all out tomorrow .
Then........... got the rings off two of the pistons. Man the were a bare ! hardest part was trying to get a tool started where the gap was. . Had to make a tool for that too. Shaped an awl to the width of the top ring lands . and a few pics ... just kept tapping until it broke a piece off then the rest was a piece of cake .
A big shout goes out to Rusty for insisting I use sea foam deep creep. I Really think that was the clincher that got them loose . It's a nice foam that does creep. Thanks Rusty and All you guys for your help.

IMG_6602.jpg
 
stroker402 said:
well .......after soaking will numerous sovents for 3 days I finally Got them All to move a inch . I 'll soak them again with sea foam deep creep tonight and will push them out tomorrow. What a JOB !
So here's how I got them out ....... with a Broom handle cut to length to use from inside on the side bosses of the piston and then for the top side I chiseled down a 4x4 block of wood ....shaped it for 3.63 bore and then shaped the wooden head of the block to the shape of the top of piston dome . so it would hit evenly across the piston . then Gave it a good wack and it moved. soaked it some more . wacked it back and forth until they all moved some . take them all out tomorrow .
Then........... got the rings off two of the pistons. Man the were a bare ! hardest part was trying to get a tool started where the gap was. . Had to make a tool for that too. Shaped an awl to the width of the top ring lands . and a few pics ... just kept tapping until it broke a piece off then the rest was a piece of cake .
A big shout goes out to Rusty for insisting I use sea foam deep creep. I Really think that was the clincher that got them loose . It's a nice foam that does creep. Thanks Rusty and All you guys for your help.

View attachment 1715316859
Click to expand...
I agree after using Deep Creep I will never use PB Blaster or the other stuff. I have had outstanding results and the guys at work have switched after using it.
 
Wyrmrider said:
anyone else try Kano KRoil?
google it
Click to expand...

I use a lot of it. Works great for stuck bolts and in conjunction with other solvents, makes an excellent bore cleaner for center fire rifles. I was going to suggest it, but it is a little harder to get hold of than most of the others suggested.
 
update on the remaining 6 stuck pistons . Knocked them out this morning with no issues. Check the fitted wooden block I made . It worked Great !
I cleaned them up and are now bathing in deep creep solvent. I'll soak them with solvent a couple times a day for 3 days and them start removing the rings..

IMG_6604.JPG
 
You must log in or register to reply here.
-

Back
Top